did muzan kill his daughter

Yes, Tanjiro does manage to kill Muzan in the manga.

The reasons could be complex. It could be related to her psychological state, financial problems, or even a tragic misunderstanding. Without more details, it's hard to pinpoint exactly why she did such a horrifying act.

Yes, in some comic storylines, the Joker has been depicted as killing his mom.

Well, there could be various reasons. Maybe there was a deep-seated family conflict that escalated beyond control, or Jeffrey might have been influenced by external factors like drugs or a traumatic event.

It could be that the Moore was mentally unstable or influenced by external factors that led him to commit such a horrifying act. There might have been financial problems, jealousy, or a history of abuse that culminated in this tragic event.

It's hard to say for sure. Maybe he was mentally unstable or under extreme stress and made a tragic and irrational decision.

Yes, in some comic storylines, the Joker has been depicted as killing his mom.

It could be due to a severe mental illness or a sudden breakdown in his psychological state.

Hard to tell exactly. It might have been a case of temporary insanity, or maybe the son did something that the father perceived as unforgivable. We'd need more context to understand this awful event.

Perhaps he was influenced by external factors like drugs or had a history of violence that culminated in this horrifying act. Or maybe it was a sudden, irrational outburst that he later regretted.